Nevertheless, although musical training is popular and is considered to be a beneficial intervention in the promotion of psychological well-being, longitudinal studies that examine the efficacy of music-making in children from low-income families are limited. Importantly, there is to date no study that examines the effects of musical training on enhancing the psychological well-being among these children. There is an imperative need for rigorous empirical scrutiny of the effectiveness of musical training in promoting the psychological well-being in children from low-income families. Therefore, the aim of this study is to examine the effectiveness of musical training in in improving the psychological well-being, in particular their self-esteem, depression, happiness and quality of life of children from low income families.